Kneel down on a mat with your hands under your shoulders and knees under your hips.
Straighten one leg and then the other leg back behind you.
There should be a straight line from the back of your head through your back, the back of your legs to your heels.
Drive your hands into the floor so that your shoulder blades flatten on your back.
Maintaining this control, lift one leg up from the floor.
Keep your leg straight as you lower it back down, and repeat with the other leg.
Ensure you keep your abdominal and buttock muscles activated throughout.
Do not allow your hips to rotate.
